Add a configuration option to allow a fixed row size for gallery thumbnails. If this option is "true", then thumbnails in the gallery will always be sized as if there are "row_size" number of images in the row. If "false", thumbnail sizing behaves "normally" (which still has kinks to iron out, see issue https://github.com/pedroabreu/ion-gallery/issues/30).
Add a configuration option to allow a fixed row size for gallery thumbnails. If this option is "true", then thumbnails in the gallery will always be sized as if there are "row_size" number of images in the row. If "false", thumbnail sizing behaves "normally" (which still has kinks to iron out, see issue https://github.com/pedroabreu/ion-gallery/issues/30).